In affected versions, vulnerability-lookup did not track or limit failed
One-Time Password (OTP) attempts during Two-Factor Authentication (2FA)
verification. An attacker who already knew or guessed a valid username
and password could submit an arbitrary number of OTP codes without
causing the account to be locked or generating any specific alert for
administrators.


This lack of rate-limiting and lockout on OTP failures significantly
lowers the cost of online brute-force attacks against 2FA codes and
increases the risk of successful account takeover, especially if OTP
entropy is reduced (e.g. short numeric codes, user reuse, or predictable
tokens). Additionally, administrators had no direct visibility into
accounts experiencing repeated 2FA failures, making targeted attacks
harder to detect and investigate.


The patch introduces a persistent failed_otp_attempts counter on user
accounts, locks the user after 5 invalid OTP submissions, resets the
counter on successful verification, and surfaces failed 2FA attempts in
the admin user list. This enforces an account lockout policy for OTP
brute-force attempts and improves monitoring capabilities for suspicious
2FA activity.This issue affects Vulnerability-Lookup: before 2.18.0.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 09 Dec 2025 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Circl
Circl vulnerability-lookup
Vendors & Products Circl
Circl vulnerability-lookup

Mon, 08 Dec 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 08 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
Description In affected versions, vulnerability-lookup did not track or limit failed One-Time Password (OTP) attempts during Two-Factor Authentication (2FA) verification. An attacker who already knew or guessed a valid username and password could submit an arbitrary number of OTP codes without causing the account to be locked or generating any specific alert for administrators. This lack of rate-limiting and lockout on OTP failures significantly lowers the cost of online brute-force attacks against 2FA codes and increases the risk of successful account takeover, especially if OTP entropy is reduced (e.g. short numeric codes, user reuse, or predictable tokens). Additionally, administrators had no direct visibility into accounts experiencing repeated 2FA failures, making targeted attacks harder to detect and investigate. The patch introduces a persistent failed_otp_attempts counter on user accounts, locks the user after 5 invalid OTP submissions, resets the counter on successful verification, and surfaces failed 2FA attempts in the admin user list. This enforces an account lockout policy for OTP brute-force attempts and improves monitoring capabilities for suspicious 2FA activity.This issue affects Vulnerability-Lookup: before 2.18.0.
Title Improper Restriction of Excessive Authentication Attempts vulnerability in CIRCL Vulnerability-Lookup
Weaknesses CWE-307
References
Metrics cvssV4_0

{'score': 8.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: ENISA

Published:

Updated: 2025-12-08T20:10:21.202Z

Reserved: 2025-04-16T12:34:02.866Z

Link: CVE-2025-42615

cve-icon Vulnrichment

Updated: 2025-12-08T17:01:13.256Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-08T12:16:03.497

Modified: 2025-12-08T18:26:19.900

Link: CVE-2025-42615

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-09T10:05:05Z

Weaknesses